sysutils/barrier: unbreak build on non-OpenSSL 3 systems (12 and 13)

Builds of barrier started failing on non-OpenSSL 3 systems after
commit 29ba81195a with the following
error:

/wrkdirs/usr/ports/sysutils/barrier/work/barrier-2.4.0/src/lib/net/SecureUtils.cpp:163:25: error: use of undeclared identifier 'EVP_RSA_gen'
    auto* private_key = EVP_RSA_gen(2048);
                        ^
1 warning and 1 error generated.

Applying the patch in commit 29ba81195a
conditionally solves the issue.

Approved by:	portmgr (build fix blanket)

sysutils/barrier/Makefile

@@ -37,6 +37,12 @@ GUI_USES=		qt:5
 GUI_USE=		QT=core,gui,network,widgets,buildtools:build,qmake:build
 GUI_CMAKE_BOOL=		BARRIER_BUILD_GUI
 
+.include <bsd.port.options.mk>
+
+.if ${OPSYS} == FreeBSD && ${OSVERSION} >= 1400092
+EXTRA_PATCHES=	${PATCHDIR}/extra-patch-src_lib_net_SecureUtils.cpp
+.endif
+
 post-extract:
 	@${CP} -a ${WRKSRC_gulrak}/include ${WRKSRC}/ext/gulrak-filesystem/